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Fixing automatic diaphragm lever of Oreston 1.8/50mm ?!
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PostPosted: Wed Apr 16, 2014 6:03 pm    Post subject: Fixing automatic diaphragm lever of Oreston 1.8/50mm ?! Reply with quote
I decided to clean the diaphragm of Oreston 1.8/50mm (similar to old Pentacon auto 1.8/50mm)
After successfully cleaning i have assembled the rear part.
By turning the diaphragm ring and pressing the lever for the automatic diaphragm it closes to the desired position, but does not return automatically. The diaphragm remains closed and can be opened only by reverse rotation of the diaphragm ring.
I do not understand the reason for this!
Does someone have a suggestion or advice?
Thank you!





PostPosted: Thu Apr 17, 2014 8:33 pm    Post subject: Reply with quote
The reason of the problem with the lever was that I tightened strongly that screw (see Picture)
After tightening, it have to be screwed back 1 / 4 turn.
Furthermore one spring was released at its upper end.
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